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U2270B 데이터 시트보기 (PDF) - Temic Semiconductors
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U2270B
Read / Write Base Station IC
Temic Semiconductors
U2270B Datasheet PDF : 13 Pages
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U2270B
Application 1
Application using few external components. This application is for intense magnetic coupling only.
9693
110 k
W
5V
47 nF
47
m
F
V
Batt
V
EXT
V
S
DV
S
U2270B
C
IN
1N4148
INPUT
RF
MS
CFE
OE
STANDBY
OUTPUT
HIPASS
470 k
W
C
HP
COIL1
1.5 nF
R
1.35
m
H
1.2 nF
COIL2
DGND
GND
V
DD
Micro-
controller
V
SS
Figure 14.
Application 2
Basic application using diode feedback. This application permits higher communication distances than application 1.
12605
BC639
360
W
12 V
4x
1N4148
68 k
W
22
m
F
75 k
W
4.7 nF
22
m
F
22
m
F
GND
100 k
W
43 k
W
V
S
V
EXT
DV
S
V
Batt
V
DD
1.2 nF
1.35 mH 82
W
Antenna
1N4148
C
IN
470 k
W
1.5 nF
C
HP
RF
MS
COIL 2
CFE
U2270B
COIL 1
Standby
Input
Output
HIPASS
OE
DGND GND
Micro-
controller
I/O
V
SS
Figure 15.
8 (13)
TELEFUNKEN Semiconductors
Rev. A3, 13-Dec-96
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